'hypervolemic' originates from Greek and New Latin, specifically the prefix 'hyper-' from Greek 'ὑπέρ' where 'hyper-' meant 'over, above', combined with New Latin 'volemia' (from elements referring to 'blood volume') where 'volemia' meant 'blood volume'.

'hypervolemic' was formed in modern medical English from the Greek prefix 'hyper-' + New Latin/Neo-Latin combining form 'volemia' (used in medical terms to denote blood volume), producing the adjective 'hypervolemic' used in clinical contexts.

Initially it was a literal formation meaning 'over (excess) blood volume'; over time it became the standard clinical adjective describing a pathological state of increased intravascular volume.